started refactoring navigation administration
before starting with inherited resources
before refactoring media links
successfully implemented media and external links
successfully implemented the sortable tree
removed navigation_elements
removed json templates
improved url method for extern links
removed navigation_element assets
removed navigation_element from ability and i18n files
removed navigation_elements table
fixed awesome_nested_set bug
removed old pages object
improved buttons and layout
i18n support for devise
fixed cancan permission problems and added some translations
improved gallery design
fixed jquery equalheights bug
improved image selector
fixed some devise bugs
improved cancan abilites and fixed z-indices
minor changes
minor changes